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					<header><h1>Periodic Comets</h1></header>
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						<a class="links" href= "index.html">Halley</a>
						<a class="links" href= "tempel-comet.html">Tempel 1</a>
						<a class="links" href= "mcnaught-comet.html">McNaught-Hughes</a>
						<a class="links" href= "wirtanen-comet.html">Wirtanen</a>
						<a id="quiz-page" href="quiz.html" >Quiz</a>
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					<h1 id="subtopic">Wirtanen Comet</h1>
					<div class="image"><img src="images/wirtanen-comet1.jpg" alt="This is a picture of Wirtanen comet" title="Wirtanen Comet"/></div>
					<div class="image"><img src="images/wirtanen-comet2.jpg" alt="This is another picture of Wirtanen comet's path" title="Another Photo for Wirtanen Comet"/></div>
					<h3 id="info">information about Wirtanen Comet:</h3>
					<p>The American astronomer Carl A. Wirtanen discovered this comet in 1948. Wirtanen Comet's orbit takes approximately 5.4 years and it will complete its next orbit in December 12, 2018.</p>
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							<strong>References</strong><br/>
						<a href="http://creativecommons.org">CreativeCommons</a><br/>
						<a href="http://lipsum.org">Lorem Ipsum</a><br/>
						<a href="http://wikipedia.org">Wikipedia</a><br/>
						<a href="http://www.grsites.com">GR Sites</a>
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